The painting was made by Osman Hamdi Bey at a time of great social and political turmoil in the Ottoman Empire, the absurd task and outdated fashions reflected the popular belief that the empire was losing its way in the world.

The Tortoise Trainer is held at the Pera Museum in Istanbul, Turkey, which specialises in 19th century paintings by European and Ottoman-Turkish artists.

The museum also holds the Anatolian Weights and Measures Collection, comprising hundreds of artefacts representing the artistic, scientific, and commercial innovations of the region.

Now we're on the right floor, where is The Tortoise Trainer? It can't have gone far… Click and drag to explore the galleries, and keep an eye out for the painting!

Here it is! Osman Hamdi Bey's The Tortoise Trainer

The painting depicts an old man, dressed in the style of a dervish, carrying a ney flute and nakkare drum. He watches his tortoises with calm contemplation, and with the drum slung on his back he even resembles them.

This unusual painting wasn't widely understood or exhibited at the time, but came to be seen as a potent satire after the Young Turk Revolution of 1908, which saw the end of the old Sultan's rule.

During his stay in Litzlberg on the Attersee in the summer of 1907, Klimt discovered a magnificent poppy-filled meadow which he captured in the painting "Poppy Field." The meadow extends across almost the entire surface of the painting.

Narrow fruit trees protrude from the meadow, but their shapes merge so strongly with the grass and flowers that their outlines are barely visible to the observer.

It is only at the top of the picture where it is possible to get a view of the landscape in the background and a narrow strip of sky.

For the painting style of this magnificent meadow scene, Klimt made use of a technique that is unmistakably reminiscent of French pointillism. During this time, French and Belgian pointillism paintings were also very popular in Vienna.

Pointillist works could regularly be seen in the Vienna Secession around 1900. Paintings by Théo van Rysselberghe were exhibited in 1899, followed by works by Paul Signac in 1900. And the great impressionism exhibition of 1903 displayed several major works by Georges Seurat.

However, the pointillist spots of color by Klimt contribute less toward color synthesis, which is based on strict methodology. Klimt's specks and dots act more as a welcome means of achieving an ornamental effect.

For example, Klimt still depicts the large poppy and daisy flowers in the foreground in a very naturalistic way.

It is only when moving backward that they increasingly turn into specks of color. The shape of Klimt's color spots therefore differs according to the spatial distance of the motifs.

Three falls and two nations! Niagara Falls is perhaps North America's most famous waterfall. Every minute, 168,000 cubic metres (or, six million cubic feet) plunges over the precipitous edge, flowing from Lake Eirie into Lake Ontario.

The falls are famed for their beauty, and for their raw energy. In 1961 when a new hydroelectric power plant was built, it was the most powerful in the world. However this plant interfered with the falls' flow so, for tourism purposes, it's only fully operational at night.

The Iguazu falls border the Argentine province of Misiones and the Brazilian state of Paraná. Together, they make up the largest waterfall in the world. When the United States First Lady Eleanor Roosevelt first saw Iguazu, she is said to have exclaimed, "Poor Niagara!"

Local legend holds that a god planned to marry a beautiful woman named Naipí, who fled with her human lover Tarobá in a canoe. In a rage, the god sliced the river in two, creating the waterfalls and condemning the lovers to an eternal fall.

Known in Lozi as Mosi-oa-Tunya, 'The Smoke That Thunders' and Tonga as Shungu Namutitima, 'Boiling Water', Victoria Falls also claims the title of World's Largest waterfalls, based on its combined width of 1,708 metres and height of 108 metres.

David Livingstone is held to be the first European to see the falls, at which point he named them in honour of Queen Victoria. During British rule, the falls became a major site of tourism. Following independence, this widened to include kayaking, bungee jumping, and rafting.

The Khone Falls and Pha Pheng Falls together form a waterfall located in Champasak Province on the Mekong River. They are the largest falls in South East Asia, and for centuries have blocked ships from travelling up the Mekong into China.

Surprisingly, these treacherous rapids are a delicate ecosystem. Hemimyzon khonensis is known from a single specimen collected at the Khone Falls, which are also home to the plabuck, an endangered species of catfish said to be the largest freshwater fish in the world.

The Yucum, or Moconá, Falls also claim a record - the second widest in the world after the Iguazu Falls. The falls only drop an average of 15 metres, but their sheer length makes them a sight to behold.